Setts



2 Sheet-She'et 1. H. L. HASTINGS & W. RUSSELL.

(N0 MOdGlJ MAGIC LANTERN.

No. 564,177. Patented m 14', 1-896.

-WI'TNEEEEL5 ENVENTSH'JRYSJ- 2 SheetsSheet 2.

(No Model. H. L. HASTINGS & W. RUSSELL.

' MAGIC LANTERN. v No. 564,177. Patented July 14, 1896.

wrflasszs Nrrn ST TES 'IIORACE ATENT arrest.

L, OF CHELSEA, MASSACHU- SAID HASTINGS.

MAGIC LANTERN.

- SPECIFICATION forming part of Letters Patent No. 564,177,dated July Application filed June 16,1893. Serial No. 477,819. No modeh 10 all whom, it may concern:

Be it known that we, HORACE LlIAs'lINGS, a citizen of the United States, and WINnLow RUSSELL, a subject of the Queen of Great 5 Britain, residing in the city of Chelsea, in the county of Sultolk and State of lilassaehusetts, have invented a new and useful Improveme nt in Magic Lanterns, of which the following is a specification. I 1 Our invention relates to a class of optical g instruments known in their various forms as magic lanterns, stercopticons, sci- I opticons, (to. There arise incidents in the use of a single I 5lantern in connection with the change oi pictures, such as the passing of dark shadows andthc visible motion of pictures across thescreen, or, in the use of opaque shutters to hide these objectionable movements, alter- 20 nations of bright light and intense darkness, .whicli are wearisome to the audience, who

i should be restfully instructed or amused by the exhibition of the pictures, and, in the use of the dissolving view produced by two Ian- 2 5 terns in alternate use, the unpleasant lizzing noise of reheating the calcium, often breaking it and involving halting the exhibition and darkness till it is repaired, the extra cost of the second lantern, and of the attendant 3o always needed to work the instruments, and

of transportation.

It is to do away in a practical manner with all these disadvantages and ditiicul'ties that our device has been invented, and in order 3 5 that our invention maybe easily understood and made with facility we accompany this specification with drawin a part of it, in. which- Figure 1 is a plan of our device. Fig. '2 is 40 a trout elevation of the shutter-carrier. Fig. 3 is a front elevation of the picture-carrier, and Fig. 4 is a front and end elevation of the picture-carrier guide.

llhe letters and designator-y signs in either 45 figure are the same for the same parts in all "the figures, and with the following descriptive s cification.

Our invention consists of amcthod and devices to use translucent or semi-opaque shut- 5o ters of sutlicient opacity to gradually obscure or ,lorcak up the definition or foiin of the pic gs, which constit utc ture on the screen, producing an ctlect. with one lantern by this device quite analogous to the dissolving produced by two lanterns, as before described, while at the same time that the picture disappears a tield'ot sufficient light remains on the screen where the picture was to entirely remove the lll'nsome and hurtful alternations of. light and darkness above desmibed, these shutters being so conne ted with apicture-carrier, properly titted for the picture is obscured by the movement of the shuttersncross the coneof light the operator bythc inst rumeul' shalhwhile the obscuration contin ues, remove the picture which has been shown and put the picture next to be shown in the position to be seen when the shutters are withdrawn and the obscuration removed. This may be understood by referring to the drawings connected with this specification, \\'l|er -in-- A, Fig. 1 the picture is a guide or support in which carrier ii is caused by our invention to move across the cone of the lanternlight. ll, represented partly by continuous and partly by, dotted lines, isthepicture-carrier. The guide A has a square aport ure (7, which stands always so that the light from the lantern shining through the lenses con- Lil purpose, that while the stitutim the condrmser l) and the ob w jective 1) may pass through it cc The picture-carrier ll turcs (J t, whose centers are distant from each other equal to the necessary distance be-- tween the centers 01" two pictures. The picture-carrier it has also two recesses for holdiug pictures, represented by the nirallelogram dotted lines l l, concentric with the squares t". The circles I) represent the position of the condenser and objective of tholantern. It is obvious that this picture-carrier ll will hold two pictures, so that by sliding it endwise they all be alternately placed in the cone of light passing through the lenses of the lantern and projected on the screen. Now 1* shows a rack attached to the picture-carricr ll, and G shows a segi'nel'ital gear attached to the end of the shaft ll, the center of which is at such a distance from the rack F that when the gear is rotated its cogs will mesh with the rack and cause the carrier to take ntrall y.

has two square apcrsuch motion as is needed to move either picture from the field of exhibition and move the other into that position. I is a shutter carrier attached to the outer end of the objective cell. The continuous and dotted lines 'J and K are two scmiopaque or translucent shutters, which are held in the carrier 1, and are caused to pass across the field of the objeetive D, and this operation may be performed by the hand by grasping the pin L, which is inserted in the shutter J, and pushing the shutter across the face of the objective, or it may be done by the action of cam M, which isboruc on the shaft II. This cam, when the shaft is rotated, comes in contact with the pin L, and by forcing it farther from the shaft pushes the shutter J across the opening of the field of the objective to cover full one-half its aperture, while the shutter K is attached to theshutter J by the flexible connection X, which passes around roller Y and gives shutter K motion in a direction opi posite to shutter J. Thus shutter K is by the same pressure of the hand' or earn made to move across the aperture of the objective to a like distance with the other shutter, thus completely covering the field of the lenses.

N represents elastic springs, which being at tached to pins 0 in the shuttencarrier I and to pine P, one in each shutter, cause the shutters to open when the pressure that shuts them is removed. Q is a handle by which the shaft ll can be rotated. R is a bearing of the shaftli, attached to the shutter-carrier. S b are bearings of the shaft ll in the top of a stand, by which our device is at tached to the base on which the lantern is fixed. As in halls of different sizes the dis tance between the condcnseulens and the objective has to be varied to give the right focus of the lantern to produce a clear picture on the screen, the shaft ll is splincd and made capable of being telescopcd on ilsel i, so as to allow obtaining the needed distances of those parts.

In Fig. 2, I isthe shutter carrier, J' K are the semiopaque shutters, N are the elastic springs, O are the pins in the shutter-carrier, and 1 are the pins in the shutters to which these springs attach. L is the pin in the shutter J, by which the shutters are moved. X is the flexible connection uniting the shutters. Y is the roller around which this connection passes.

In Fig. 3, A is the carrier-guide. I3 is the picture-carrier. C U are the square apertures. D is the condenser. E are the recesses for holding the pictures.

F is the rack. G is the segmental gear. 11 is the shaft.

In Fig. l, A is the carrier-guide. U is the square aperture. '1 are cars to connect it to the lantern at the side. U are screws for making this connection. V is the ear for att chipg it to the lantern at the top. W is the screw for making this connection.

As it often happens that the lantern cannot The dot ted linesbe set exactly in front of the center of the screen on which the picture is shown, but in some ain'liencerooms must be set above, below, or on one side. In this case the picture in the lantern is not parallel to the screen, and for that reason one portion of the picture entire screen wiii be dim, while the others are distinct, this effect resulting from the fact that a portion of the screen from its want of parallelismwith the picture' is not at the proper focal distance from the picture in. the picture-carrier, a difiiculty which has hithbe exactly parallel to the front of the objective. To avoid this difficulty, we have devised means in the arrangement and construction of the picture-carrier guide A, by which the picture can be adjusted exactly parallel to the screen, (see Fig. 4,) which gives a front and end elevation of the picturecarricr guide A. The carrier-guide is so made that it is attached to the lantern by cars T in the horizontal line, having slots in them through which the screws U are inin which the screw W is inserted. The earlier-guide can be swung around to the necessary position on the vertical axis supplied by the screw Vt by loosening the screws U and readjusting them in their slots, and it can be also swung on a horizontal axis supplied by the screws U by readju'sting theserew W. "By this means the picturecarricr is made to hold the pictures parallel to the screen, all

parts being in accurate focus on the screen.

Now it will be manifest that, all the parts of this device being'propcrly adjusted, ii the shaft ll be causedto rotate by the handle Q,

the cam M W] ll press the semiopaquc shutters J and K across the field of the lantern and obscure the picture on the screen, by causing is unseen, and the abovc-dcscribed faults and imperfections of operation are a oided. As the shaft does not form rigid attachments a e the shutters J and K and. the carrier B, these scuiiopaque shutters being still used and necessary to produce the disappearance or dissolving Olithe picture.

Having thus described-our invention, what ters Patent, is-

erto necessitated the readjustment of the, screen in such. a-position that the screen Will serted, and by an ear V in the verticailineit gradually to fade out, while the screen still has a hold of white light, and at the same are also operated independently byhand w. .311 it is desirable to produce various effects, the y In a device of the character described, the

turcs are thus so changed that their motion we chimes-new, and desire to secure by Let combination of a picture-carrier guide ad' justable to the plane of the screen on which the picture is shown, a picture-carrier having a racleattachment, a segmental gear meshing 5 with the picture-carrier rack, a segmentalgear shaft havinga longitudinal adjustment, a'cam on the shaft which forms connection with the semiopaque material of the shuttercarrier fixed to the front of the objective, and

10 means of imparting a rotating movement to the shaft. adapted to give automatically 2, re-

In testimony whereof we sign this specification in the presence of two witnesses.

HORACE L. IIASTIN GS. WINDLOVV RUSSELL.

Witnesses: I J. D. BROWN, FRANK G. PARKER. 

